A full digital control platform inertial navigation system

An inertial navigation system and control system technology, applied in directions such as navigation through speed/acceleration measurement, can solve problems such as inability to complete system self-calibration and self-aiming, error rotation modulation, etc., to achieve self-calibration and self-alignment, suppression The effect of system error divergence and system volume reduction

CN103968840BActive Publication Date: 2017-01-25BEIJING INST OF AEROSPACE CONTROL DEVICES
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-01-25

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Abstract

The invention relates to an all-digital control platform type inertial navigation system. The system comprises a system box, a control system, a support frame and an inertial measurement unit, wherein the control system comprises an embedded computer, a motor driven circuit, an interface circuit and an external communication interface; the support frame comprises an outer support frame and an inner support frame; the inertial measurement unit comprises three fiber-optic gyroscopes and three quartz accelerometers, which are orthogonally arranged and an interface circuit. According to the system disclosed by the invention, the high-precision rate type fiber-optic gyroscopes replacing traditional integrating gyroscopes are used for carrying out the stable control on the platform frame system; the all-digital circuits are adopted to carry out the platform internal control and navigation solution; therefore, the system disclosed by the invention has the advantages of effectively simplifying the electrical system complexity, reducing the system size, reducing the cost and increasing the control accuracy on the premise of realizing the high precision control.
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Description

technical field

[0001] The invention relates to an all-digital control platform type inertial navigation system, especially applied to the system volume with strict restrictions, and belongs to the field of inertial navigation. Background technique

[0002] The platform inertial navigation system is a navigation system that uses the fixed axis of the gyroscope to drive the platform frame system to keep the combined measuring platform stable in the designated inertial space, so that the linear accelerometer of the measuring platform can perform recursive position calculation. Traditionally, in order to maintain the dynamic and static characteristics of the space stability of the platform, a high-precision integral position gyroscope is generally used, which can meet the requirements of high-precision inertial navigation. However, the electrical system is relatively complex, the platform system is bulky, and the hardware cost is relatively high.

[0003] With the continuous a...

Examples

Embodiment Construction

[0023] The specific embodiment of the present invention will be further described below in conjunction with the accompanying drawings.

[0024] like figure 1 , 2 As shown, an all-digital control platform type inertial navigation system of the present invention includes: a system box 1, a control system 2, a support frame 3 and an inertial measurement combination 4, wherein the control system 2 includes an embedded computer 21 and a motor drive circuit 22 And interface circuit 23 (fiber optic gyroscope interface circuit, quartz accelerometer interface circuit); Support frame 3 includes outer support frame 31 and inner support frame 32 again, and inertial measurement combination 4 includes three fiber optic gyroscopes three quartz of orthogonal installation again Accelerometers (three fiber optic gyroscopes and quartz accelerometers are respectively installed on the three measurement axes of the inertial measurement combination);

[0025] The system box 1 provides the installa...